This document discusses direct current (DC) circuits and calculations for current and voltage in circuits with multiple resistors connected in series and parallel. It provides examples of calculating total resistance, current, voltage dropped across individual resistors, and percent error in measurements. Calculations are shown for circuits with up to 4 resistors connected in various series and parallel configurations.

1. (Series DC Circuits)
1.
14
2.
23

2. 1.
2.
3.
4.

4. 2. (RT)
RT = R1+R2+R3
RT = ………………………..
3.
A D RT =
…………………………………..
4.
(%
5.Error) % Error =………………………………% -
(RT)
IT = V1 / RT IT =
………………………………mA

5. 6. (Range 25
mA) IT
R1 , R2 R3 - (a) , (b) , (c)
(d)

6. 7.
IT = …………………………………..mA
IR1 = …………………………………..mA
IR2 = …………………………………..mA
IR3 = …………………………………..mA
8. IT
IT
(% Error) % Error =
9.
……………………………..% R1 , R2 , R3
VR1 = IR1 x R1…………………………………..V
VR2 = IR2 x R2…………………………………..V
VR3 = IR3 x R3…………………………………..V

7. 10.
- V
VR1 = …………………………………..V
VR2 = …………………………………..V
VR3 = …………………………………..V
VR1+ VR2+ VR3 = ……………..………..V
11. VR1 , VR2 , VR3
12.
(% Error) % Error = , V
VR1 , VR2 R3
……………………………..% V 1
(% Error) % Error =
……………………………..%

8. 1.
2. IT =
………………………………
V
3. T = …………………V-
R2 VR2 = .……………..V

9. 4. - R1
mA R2 , R3 R4

10. IR1 = …………………………………..mA
IR2 = …………………………………..mA
IR3 = …………………………………..mA
IR4 = …………………………………..mA
5. -
mA
6.
V
Volt